James g



(No Model.)

J. G. WILSON.-

FLOORING.

No. 529,772.A

Patented Nov. 27, 1894.

NITED STATES PATENT OFFICE.

JAMES G. W'ILSON, OF NEW YORK, N. Y.

FLOORING.

SPECIFICATION forming part of Letters Patent No. 529,772, dated November27,1894.

Application 'filed May 16,1894. Serial No. 511,404. (No model.)

To a/ZZ whom it may concern.-

Beit known that I, JAMES G. WILSON, a subject of the Queen of GreatBritain, and a resident of New York, in the county and State of NewYork, have invented certain new .and useful Improvements in Flooring, ofwhich the following is a specification. y

My invention has reference to improvements in wood block Iiooring andespecially to the concrete bed or other substructure to which the blocksare secured by a cementitious material, such as asphalt mastic.Heretofore it has been the practice either to spread the cementitiousmaterial upon the smooth surface of the substructure, or to prepare thelatter by pressing into the same while soft dovetail strips of sheetmetal, into which the mestic enters. The objection tothe first mentionedmethod is, that the mastic very frequently does not hold to thesubstructure, while the execution of the latter method is troublesomeand expensive.

y To overcome the objections to the methods at present in use, I roll orotherwise form directly into the substructure, while the same is in aplastic condition, a series of channels, grooves, or chases. Thecementitious material applied after the substructure has hardcned entersthese channels, grooves or chases and is consequently securely held tothe substructure.

The general nature of the substructure, will best be understood whendescribed in connection with the annexed drawing, in which the ligure isa perspective, sectional view of a part of a flooring constructedaccording to my improvements.

Referring to the drawing, the letter B designates the finishing layerbuilt up of blocks A of wood or other suitable material.

C is the substructure composed, as usual, of a cement concrete bed c anda bed of tile, brick or coarse concrete d; and D is the asphalt mastic,bitumen, or other suitable cementitious material securing the blocks tothe bed c of thesubstructure. After the concrete cement has been floatedon in the usual manner, I form on its surface while still plasterial isstill lin a plastic condition.

What I claiml as new isl. The herein described method of layingcomposite iooring consisting in first laying a hydraulic cementfoundation, then forming dovetail grooves or channels in the uppersurface thereof, then allowing said foundation to set, then covering theupper surface and the channels of the foundation with a bituminouscompound or other cementitious material and finally placing blocks orstrips of wood into the bituminous compound, so that the interpositionof bituminous material or mastic will bond the blocks to the cementfoundation without other mechanical agencies.

2. A composite flooring made up of strips or blocks of wood havingdovetail channels on their under sides and laid upon a hydraulic cementfoundation, having dovetail channels or grooves on its upper side, and abituminous compound or mastic interposed between the blocks or stripsand cement foundation; the said interposition being placed while hot soas to take into the dovetail grooves of the blocks and those of thecement foundation, respectively, and secure the two together without theagency of other 'mechanical means, substantially as specified.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 10th day of May, 1894.

JAS. G. WILSON.

Witnesses:

W. A. ROEDEL, AECHD. MoNIooLL.

